What happens when the seller was underpaid; he received five instead of six?
The sale is automatically nullified and he receives his object back.
The sale remains, and he is paid the remaining money.
Nothing. This level of Ona’ah is wrong, but is not refunded.
The seller has a choice between nullifying the sale, or staying with the sale and receiving the remaining money.
The buyer has a choice whether to return the object, or to pay the seller the remaining money.
At what point does someone who was overcharged by exactly a sixth forgive this extra money?
Only several hours later.
Only at the end of the day.
Even immediately, as soon as he finds out.
When the seller asks him for Mechila.
During Tefillas Zaka at the beginning of Yom Kippur.
What did the Merchants of Lud see as the biggest advantage?
That they could get away with charging a higher price.
That a “deal would be sealed” in a shorter period of time.
That they got to speak with R. Tarfon several times.
The feeling that their sixth-grade math teacher would be proud of how well they followed the Sugya.
The free advertising that having their Sugya discussed in the Beis Medrash gave them.
If the Rabanan held that a cheated buyer can always nullify the sale, why did the Merchants of Lud prefer their position over that of R. Tarfon, who only allows nullification until the end of the day?
The latitude in money that the Rabanan allowed them was still far more profitable than the fair percentage of people who will request nullification.
It is rare that a buyer ever wants to nullify a sale.
They knew that merchants and relatives are hesitant to tell someone he was cheated.
Machlokes between answers A and C.
Machlokes between answers B and C
How does overcharging a sixth compare with overcharging less than a sixth?
There is no difference, they are both forbidden.
There is no difference, the money must be refunded in both cases.
There is no difference, in both cases the wronged person has a choice to annul the sale, or have the money refunded.
Overcharging more than a sixth is forbidden Mideoraisa, and overcharging less than a sixth is forbidden Miderabanan.
Both are forbidden Mideoraisa, but the extra money must only be returned if the overcharged amount is more than a sixth.